Cracked exhaust manifold

[JimsCJ5]

Hey Gang,
We had an exhaust leak between the intake and the exhaust manifolds. As usual the project snowballed form there. The exhaust manifold has a significant crack at the exhaust pipe mounting flange. I purchased a used manifold but it is also cracked in the same place although not as bad. I assume this is a common problem. Is it worth getting repaired or should I spring for a new one? I can get one on ebay for $147 shipped.
I'll attach pics of the old manifold.




Also, we bought a intake manifold gasket kit which contains four gaskets (exhaust manifold, intake manifold, exhaust donut and the square gasket between the intake and exhaust) however when we removed the manifolds there was only the exhaust gasket. Am I supposed to use both gaskets or is one discarded? Pics below:

TIA,
Jim

 

[Torxhead]

I would consider a repair first, but there are new replacements available.

 

[IOPort51]

If you can find an 80s intake and exhaust you can eliminate that damned donut gasket, have a water cooled aluminum intake manifold, use a 2 bbl carb if you don,t already have one, have the proper intake if and when you go with a 4.0 head and get away from that silly married manifold thing.

and yes, you use both of the gaskets.

 

[JimsCJ5]

If you can find an 80s intake and exhaust you can eliminate that damned donut gasket, have a water cooled aluminum intake manifold, use a 2 bbl carb if you don,t already have one, have the proper intake if and when you go with a 4.0 head and get away from that silly married manifold thing.

and yes, you use both of the gaskets.

Really? From what year? We have the stock 2 barrel but want to upgrade to a weber one of these days. Not really looking for more power (it's my 16 yr old's) right now but wouldn't mind more effeciency.

 

[Peanut Butter]

If you decide to have it repaired, make sur they repair guy knows what he is doing. Cast metal must be heated before welding and heated dueing the cool down period so as not to cool too quickly. This is tricky if you have never done this before. Rod

 

[JimsCJ5]

Thanks Rod, I am a hack welder at best so I would be taking this in to have it done. If it costs more than 100 bucks I'll just get a new one.

 

[IOPort51]

Really? From what year? We have the stock 2 barrel but want to upgrade to a weber one of these days. Not really looking for more power (it's my 16 yr old's) right now but wouldn't mind more effeciency.

anything after 81 , I think.

I would not even think about welding, been there done that. At very best you will have a manifold that eats doughnuts, literally.

 

[JimsCJ5]

OK. We are seriously considering taking IO's advice and upgrading to the later intake and exhaust. A list member has the intake and has graciously offered it for sale. Is this the exhaust I should be looking for?
New Exhaust Manifold J Series Cast Iron Jeep Wrangler Cherokee Wagoneer CJ7 | eBay

Are there any other gotchas I need to be aware of for this swap?

 

[Petescj]

Heres some pics of the intake. Im pretty sure it came off a Yj AMC 258 i6 / 4.2l .

 

[IOPort51]

the coolant hose fittings and the CTO switch. It you decide to make it water cooled, I would.

remember: nothing is ever as easy as it first looks.


Pete, are those water jacket holes threadded or is it a press fit??

 

[IOPort51]

OK. We are seriously considering taking IO's advice and upgrading to the later intake and exhaust. A list member has the intake and has graciously offered it for sale. Is this the exhaust I should be looking for?
New Exhaust Manifold J Series Cast Iron Jeep Wrangler Cherokee Wagoneer CJ7 | eBay

Are there any other gotchas I need to be aware of for this swap?

this should do it.

 

[Petescj]

the coolant hose fittings and the CTO switch. It you decide to make it water cooled, I would.

remember: nothing is ever as easy as it first looks.


Pete, are those water jacket holes threadded or is it a press fit??

Their threaded so thats easy enough.

 

[JimsCJ5]

the coolant hose fittings and the cto switch. It you decide to make it water cooled, i would.

Remember: Nothing is ever as easy as it first looks.:d


pete, are those water jacket holes threadded or is it a press fit??

cto?

 

[JimsCJ5]

Looks good Pete. Let me know how you want to be paid. My zip is 30041.
Jim

 

[Petescj]

Looks good Pete. Let me know how you want to be paid. My zip is 30041.
Jim

Sending pm

 

[IOPort51]

is it cto or just ct switch? coolant temp switch. primarily controls the thermostatic air cleaner.

 

[Petescj]

is it cto or just ct switch? coolant temp switch. primarily controls the thermostatic air cleaner.

I know what your talking about. I'll see if I have one laying around.

 

[Petescj]

Talking about one of these? Its not exactly the same but close. I havent found one in my parts yet but still have a couple other places to look.

Jeep Cherokee Wagoneer J10 J20 CJ5 6 7 V8 Ported Vacuum Switch EF5358881 | eBay

 

[JimsCJ5]

Ok. We got the intake and new exhaust manifold installed but we ran into a hitch. The carb linkge bolted to the old exhaust manifold and there is no provision for that on the later model exhaust. I am assuming I can use a 1984 or so linkage set-up. Is that the case? You can see what I am referring to below:

TIA,
Jim

 

[IOPort51]

I am going to say yes. It has been a long time. It was pretty easy because I didn't have to get really creative until the MC2150. Go with the later model linkage.